Blood Relations

From the given information, we know that A is the brother of both B and C. However, to determine the relationship between B and C, we need additional information. Step 1: Checking the necessity of information (i) - Gender of C If we know whether C is male or female, we can determine whether B and C are brothers or siblings.
Step 2: Checking the necessity of information (ii) - Gender of B Similarly, if we know the gender of B, we can determine whether B and C are brothers or siblings.
Step 3: Conclusion Without knowing the gender of C, we cannot determine whether B is the sister or brother of C. Likewise, without knowing the gender of B, we cannot determine whether C is the sister or brother of B. Thus, both (i) and (ii) are necessary to determine the relationship. % Correct Answer Correct Answer: (d) Both (i) and (ii)